I would be surprised if Axl agrees to it. I remember he did some photo ops at one of the Vegas shows but don't remember the details.
My guess is that it would cost at least $2000 and only have Axl, Slash and Duff.

don't quote me on this but I think Slash did M&Gs back when he was with Myles. Like a $500 deal and one more expensive that came with a signed guitar. I remember seeing them offered when he came to Austin...I believe maybe 2011 or 2012